If you have Windows Vista or Windows 7 and you saved your project files in the Beatcraft folder, or anywhere inside your "C:\Program Files\" folder, the project files are likely still there, but hidden due to a Windows security feature called "virtualization." Browse to the folder where you saved your projects in Windows explorer and click the "Compatibility Files" option at the top of the screen to reveal the hidden files.
In the future, try rendering the files to a folder that is not in C:\Program Files\.
